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28<h2><span class="refentrytitle">Function template value_as</span></h2>
29<p>boost::histogram::axis::traits::value_as — Returns axis value for index if it is convertible to target type or throws. </p>
30</div>
31<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
32<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../../histogram/reference.html#header.boost.histogram.axis.traits_hpp" title="Header &lt;boost/histogram/axis/traits.hpp&gt;">boost/histogram/axis/traits.hpp</a>&gt;
33
34</span>
35<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Result<span class="special">,</span> <span class="keyword">typename</span> Axis<span class="special">&gt;</span>
36  <span class="identifier">Result</span> <span class="identifier">value_as</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">Axis</span> <span class="special">&amp;</span> axis<span class="special">,</span> <span class="identifier">real_index_type</span> index<span class="special">)</span><span class="special">;</span></pre></div>
37<div class="refsect1">
38<a name="idm45113191824416"></a><h2>Description</h2>
39<p>Like boost::histogram::axis::traits::value, but converts the result into the requested return type. If the conversion is not possible, throws std::runtime_error.</p>
40<p>
41
42</p>
43<div class="variablelist"><table border="0" class="variablelist compact">
44<colgroup>
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50<td><p><span class="term">Parameters:</span></p></td>
51<td><div class="variablelist"><table border="0" class="variablelist compact">
52<colgroup>
53<col align="left" valign="top">
54<col>
55</colgroup>
56<tbody>
57<tr>
58<td><p><span class="term"><code class="computeroutput">axis</code></span></p></td>
59<td><p>any axis instance </p></td>
60</tr>
61<tr>
62<td><p><span class="term"><code class="computeroutput">index</code></span></p></td>
63<td><p>floating point axis index </p></td>
64</tr>
65</tbody>
66</table></div></td>
67</tr>
68<tr>
69<td><p><span class="term">Template Parameters:</span></p></td>
70<td><div class="variablelist"><table border="0" class="variablelist compact">
71<colgroup>
72<col align="left" valign="top">
73<col>
74</colgroup>
75<tbody>
76<tr>
77<td><p><span class="term"><code class="computeroutput">Axis</code></span></p></td>
78<td><p>axis type </p></td>
79</tr>
80<tr>
81<td><p><span class="term"><code class="computeroutput">Result</code></span></p></td>
82<td><p>requested return type </p></td>
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85</table></div></td>
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93<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Hans
94      Dembinski<p>
95        Distributed under the Boost Software License, Version 1.0. (See accompanying
96        file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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